Income and other Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income tax benefit (expense)	$ 0	$ (19,000)	$ 502,000	$ (131,000)
Income tax (expense) benefit, discontinued operations	$ 0	$ 0	$ 0	$ 0
Effective tax rate	(0.00%)	(0.80%)	(4.20%)	(2.10%)
Income tax penalties and interest accrued	$ 400,000		$ 400,000		$ 300,000